2013 Nissan Altima Belt Diagram: The Ultimate Guide

If you own a 2013 Nissan Altima, there’s a hidden hero under your hood that keeps your car running smoothly—the serpentine belt. While it’s not as flashy as your touchscreen dashboard or those sleek headlights, it’s absolutely essential. This guide is your one-stop resource for understanding the 2013 Nissan Altima belt diagram, why it matters, and how to take care of it like a pro.

Why the Serpentine Belt is the Unsung Hero of Your Engine

Let me tell you a quick story. A friend of mine, Sarah, was driving her Nissan Altima on a hot summer day when suddenly, the A/C stopped blowing cold air, the battery warning light turned on, and the steering felt heavy. She was puzzled until a mechanic told her the serpentine belt had snapped. That simple, overlooked belt caused a series of unfortunate events.

This story shows just how crucial the serpentine belt is. It powers components like:

The alternator
The power steering pump
The water pump
The A/C compressor

In short, without it, your car isn’t going anywhere fast—or at all.

Understanding the 2013 Nissan Altima Belt Diagram

The belt diagram is like a treasure map. It shows you how the serpentine belt routes around the various pulleys in the engine bay. For the 2013 Nissan Altima, the belt runs through:

Crankshaft Pulley
Alternator
Power Steering Pump
Water Pump
A/C Compressor
Tensioner Pulley
Idler Pulley

Here’s a visual diagram for the 2013 Nissan Altima that you can reference when inspecting or replacing the belt.

How the Serpentine Belt Works: Simple Yet Powerful

Think of the serpentine belt as a delivery route. It picks up energy from the crankshaft and delivers it to the accessories mentioned above. It’s made of rubber and is usually reinforced with fibers to handle high tension and friction.

The belt’s grooved design helps it grip the pulleys securely. If it slips, everything from your electrical system to your power steering can fail.

Inspecting the Serpentine Belt on a 2013 Nissan Altima

How Often Should You Inspect It?

The rule of thumb is to inspect your belt every 30,000 miles or at every major service interval. However, if you’re hearing squealing sounds or notice any dashboard warnings, it’s time to check sooner.

Step-by-Step Belt Inspection Guide

Open the Hood and locate the serpentine belt.
Use a flashlight to get a clear look at the entire length.
Look for cracks, fraying, or glazing (a shiny, slick appearance).
Gently press the belt to test for tension—it should not have more than half an inch of give.
Listen for unusual noises when the engine starts.

If any of these signs are present, replacement is likely necessary.

Tools You’ll Need for a Belt Replacement

To make your life easier, here’s a handy checklist:

Tool	Purpose
3/8″ Ratchet Wrench	Release tensioner
10mm Socket	Remove components
Belt Tensioner Tool	Manage belt tension easily
Safety Gloves & Goggles	Stay safe during work
Jack and Jack Stands or Ramps	Gain better access under the car

Pro tip: Consider investing in a serpentine belt tool kit if you plan to do this more than once.

Step-by-Step Guide to Replacing the Serpentine Belt

1. Disconnect the Battery

Start by disconnecting the negative terminal to prevent any electrical issues.

2. Remove the Passenger Side Wheel (If Needed)

This allows better access to the tensioner and crank pulley.

3. Release Belt Tension

Use your belt tensioner tool or a 14mm wrench to rotate the tensioner and relieve belt pressure.

4. Remove the Old Belt

Carefully remove it from each pulley, noting the routing.

5. Follow the 2013 Nissan Altima Belt Diagram

Refer to the belt routing diagram to install the new belt correctly.

6. Double-Check Alignment

Ensure the belt is snug in every pulley groove.

7. Reconnect the Battery

And voilà—power restored!

8. Start the Engine and Observe

Listen for squeaks and check that the belt is running smoothly. If not, turn off the engine and inspect again.

Video Guide on 2013 Nissan Altima Belt Diagram

Also Read: Ram 1500 5.7 Oil Capacity

Common Mistakes to Avoid During Belt Replacement

Incorrect routing: Always follow the diagram carefully.
Improper tension: Too tight and it’ll wear quickly; too loose and it’ll slip.
Not checking pulleys: Worn pulleys can damage your new belt.
Skipping inspection: Don’t assume new belts are perfect—check for manufacturing defects.

Choosing the Right Replacement Belt

There are several options, but EPDM (ethylene propylene diene monomer) belts are a top choice for durability. You can find reputable brands like:

Gates
Dayco
Bando

Make sure the replacement belt matches your Altima’s engine type—whether it’s the 2.5L 4-cylinder or 3.5L V6.

When Should You Replace the Serpentine Belt?

Signs it’s time for a replacement:

High-pitched squeal when starting the engine
Visible cracks or wear
Loss of power steering or A/C
Battery not charging properly

Most belts last around 60,000 to 100,000 miles, but it’s better to be proactive.

Why a Healthy Serpentine Belt = Long-Term Savings

Neglecting your serpentine belt could lead to:

Engine overheating
Loss of steering
Battery failure
Expensive repairs

Investing in a $30–$50 belt and 1–2 hours of your time can prevent $1,000+ in damage.

Where to Buy a Serpentine Belt for Your 2013 Nissan Altima

Here are a few trusted places to grab your replacement:

Amazon Auto Parts
AutoZone
RockAuto
NAPA Auto Parts

Pro tip: Always check the return policy and compatibility based on your VIN number.

Final Thoughts: Take Care of Your Belt, and It’ll Take Care of Your Ride

Your 2013 Nissan Altima deserves a little TLC, and that starts with the serpentine belt. It’s a simple part with a powerful impact. Taking the time to inspect, replace, and understand your belt diagram can keep you from costly breakdowns—and even make you feel like a car repair champ.

Quick Recap:

Inspect every 30,000 miles
Replace around 60,000–100,000 miles
Use the correct diagram to avoid routing mistakes
Choose high-quality belts
Avoid common installation errors

So go ahead—open that hood with confidence. Your Altima will thank you.